Kaname Tōsen is the captain of the 9th Division at the start of the Bleach series. He has been blind since birth, but is capable of using his spiritual sense to “see”. Tōsen is an extremely calm and serious pacifist, though he will not restrain from fighting for what he believes in or to preserve justice. 
His philosophies were adopted from a peaceful friend he had before becoming a Soul Reaper. When the peaceful friend’s husband killed her for nagging him, Tōsen became disillusioned that such a righteous person could be killed for such an insignificant reason. After the murder, his creed in life became “take the path with the least bloodshed”. He feels it necessary to join Sōsuke Aizen in defecting from the Soul Reapers at the conclusion of the Soul Society arc. However, during his battle against Komamura in the Fake Karakura Town, it is revealed that the reason he betrayed the Soul Reapers was because he saw injustice in the Soul Society’s refusal to administer capital punishment to his friend’s killer.
Though he nearly succeeds in killing Komamura with his new found Hollow powers, Tōsen, with his new sight, forgets about everything else around him and is stabbed through the head when Hisagi releases his zanpakutō. Mortally wounded and returning to his old self, he sheds a tear for Komamura when the latter tells him that losing Tōsen would be unbearable for him. He then calls Hisagi to his side, but as he requests to see Hisagi’s face clearly once more, Tōsen dies in an explosion of blood, seemingly caused by Aizen.